1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
harkovskaia [24]
3 years ago
7

5) What is the result of subtracting (x2 + 3x)from the polynomial (-2x2 + 4x + 5)?​

Mathematics
2 answers:
Galina-37 [17]3 years ago
8 0

Answer:

- 3x² + x + 5

Step-by-step explanation:

- 2x² + 4x + 5 - (x² + 3x) ← distribute by - 1

= - 2x² + 4x + 5 - x² - 3x ← collect like terms

= - 3x² + x + 5

Alexus [3.1K]3 years ago
3 0

Hi

Golden rule to know by heart : you can only add or substract element of the same kind.

so X^2 with X^2 , X with X , numbers with numbers...

exemple : 2X^2 +3X^2 = 5X^2

but 5X^2 -3X remains that way as 5X^2 is a " X^2" and " 3X" is a " X" so I can't substract two elements of different kind.

Now you have to translate what is ask of you into a calculus.

so : you have

A ) ( 2x^2+4x +5) - ( x^2+3x)

Math is a sport of the mind. You will only progress and become stronger if you train.

So I let you have a shot. beware of signs rules. If you still have trouble, ask in comment section..

You might be interested in
Pls I really need help
Masteriza [31]

Answer:

6.x8/929298+9082'1

Step-by-step explanation:

3 0
3 years ago
What is the value of cos 0 given that (-2, -3) is a point on the terminal side of 0?
Alla [95]

Answer:

depends what the slop is

Step-by-step explanation:

take the slop and go backwards up that till you get to 0 the you have your answer

3 0
3 years ago
No solution or one solution because??
amm1812

Answer:

one solutions

Step-by-step explanation:

7 0
3 years ago
It has been decided that 100 people need to be surveyed to decide the publics opinion on a school building project. A student su
Morgarella [4.7K]

Answer:

The proposed way of sampling is a biased way to perform the survey.

Step-by-step explanation:

Convenience sampling is a kind of non-probability sampling method that comprises of the sample being taken from that portion of the population that is near to hand.  In this type of sampling method, all items doesn’t have an equivalent chance of being selected, which doesn’t comprises of random collection of items.

Convenience sampling is where we take in items which are easy to reach.

Convenience sampling consists of selection bias, i.e.e the bias involved in the sample due to inappropriate selection procedures.

For example, randomly selecting 4 people sitting near him to guesstimate the mean age of the class is a convenience sampling example. or gathering information on customer satisfaction by interviewing 6 randomly selected customers from a local store is an illustration of convenience sampling.

In this case, the sample suggested by the students consists of surveying the first 100 people who enter the school, about the public opinion on a school building project.

This is an example of convenience sample.

So, there is a selection bias present in the sample.

Thus, the proposed way of sampling is a biased way to perform the survey.

4 0
3 years ago
What is the value of x in the equation <br> -x =2 - 3x +6?<br> 1) 8<br> 2) 4<br> 3) -4 <br> 4) -8
4vir4ik [10]

Answer:

x=4 Postive

Step-by-step explanation:

See the steps below:)

3 0
3 years ago
Read 2 more answers
Other questions:
  • How can you 6/3 into a mixed number?
    9·2 answers
  • Pls help<br> -10y + 18 = -3(5y - 7) + 5y<br> what is y?
    13·1 answer
  • An art teacher uses 1 quart of blue paint each month. In one year how many gallons of paint will she use
    9·1 answer
  • What is the range of 12 8 17 12 15 18 30
    8·1 answer
  • Consider g(x)= {a sin x + b, if x ≤ 2pi} {x^2 - pi x + 2, if x &gt; 2pi}
    15·1 answer
  • To make a shade of paint called jasper green, mix 4 quarts of green paint with 2/3 cups of black paint. How much green paint sho
    7·1 answer
  • If the US released 5.877 billion metric tons of carbon dioxide and 1 trillion pounds=0.4536 billion metric tons, how many trilli
    7·1 answer
  • Tom swam at a pool each day, for 5 days, during one week. The number of people
    13·1 answer
  • Estimate the solution to the system of equations.
    14·1 answer
  • Question<br> Estimate the perimeter of the figure to the nearest whole number.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!